请高手编出新的自动挂课代码，谢谢。

hailu01

以下代码为时代光华老网站http://yc.cneln.net:8080/eln3_asp/index.do 自动挂课代码，
现时代光华网站已改成http://yc.21tb.com/，请高手编出新的自动挂课代码，谢谢。










var courseId = getCookie("COURSEID");
if (courseId == null) {
        console.log("搜索URL...");
        courseId = getUrl("courseId");
}

if (courseId == null) {
        throw "未找到课程ID,可能当前窗口不是观看课程页面";
}
var playTime = 10000000;
saveNormal();

function getCookie(name) {
        var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
        if (arr = document.cookie.match(reg))
                return unescape(arr[2]);
        else
                return null;
}

function getUrl(name) {
        var arr, reg = new RegExp(name + "=([^&]*)");
        if (arr = window.location.href.match(reg))
                return unescape(arr[1]);
        else
                return null;
}

function saveNormal() {
        var request = new XMLHttpRequest();
        var url = "../../../../../../eln3_asp/common/learning.do";
        var data = "method=saveNormalOnlineCoursePrecent&courseId=" + courseId
                        + "&playTime=" + playTime;
        request.open("POST", url, true);
        request.setRequestHeader("X-Requested-With", "XMLHttpRequest");
        request.setRequestHeader("Accept",
                        "text/javascript, text/html, application/xml, text/xml, */*");
        request.setRequestHeader("Content-Type",
                        "application/x-www-form-urlencoded; charset=UTF-8");
        request.onreadystatechange = function() {
                if (request.readyState == 4) {
                        console.log(request.responseText);
                        console.log("刷新课程列表,看看课程[" + courseId + "]是否已经100%");
                }
        };
        request.send(data);
}